APA (7th ed.) Citation

Sidgwick, H. (1893). The methods of ethics (5th ed.). Macmillan.

Chicago Style (17th ed.) Citation

Sidgwick, Henry. The Methods of Ethics. 5th ed. London ; New York: Macmillan, 1893.

MLA (9th ed.) Citation

Sidgwick, Henry. The Methods of Ethics. 5th ed. Macmillan, 1893.